When solving an equation with two variables, replace the variables with the values given and then solve the now variable-free equation. (Remember order of operations, PEMDAS, Parentheses, Exponents, Multiplication/Division, Addition/Subtraction.)
Solve -7a + 9a = 2a - 2y - 3 for a in terms of y.
| 10y + 4 | |
| \(\frac{7}{8}\)y - \(\frac{3}{8}\) | |
| \(\frac{1}{5}\)y - 1\(\frac{3}{5}\) | |
| 1\(\frac{2}{9}\)y + \(\frac{1}{3}\) |